1.

Two fair dice are rolled. Let P(A_(i))gt0 donete the event that the sum of the faces of the dice is divisible by i. For which one of the following (I,j) are the events A_(i)and A_(j) independent ?

Answer»

`(3,4)`
`(4,6)`
`(2,3)`
`(4,2)`

SOLUTION :`P(A_(2))=1/2,P(A_(3))=1/3,P(A_(6))=1/6`
`THEREFOREP(A_(2)nnA_(3))=P(A_(2))P(A_(3))`
`impliesP(A_(6))=P(A_(2))P(A_(3))`
`6/36=1/2xx1/3`
HENCE, `A_(2)and A_(3)` are independent.


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